When I play the videos with VLC, i have to right-click -> subtitles->sub track -> track 1 to activate the subtitles. But they are displayed using a small font size which I want to increase. Thus I go to Tools->preferences->Subtitles and set a larger font size but it doesn't have any effect in the display of these subtitles. I tried to close VLC and reopen it.General
Complete name : hello.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 83.3 MiB
Duration : 9mn 32s
Overall bit rate mode : Variable
Overall bit rate : 1 220 Kbps
Writing application : Lavf55.33.100
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : Main@L3.1
Format settings, CABAC : Yes
Format settings, ReFrames : 3 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 9mn 32s
Duration_FirstFrame : -40ms
Bit rate : 961 Kbps
Width : 1 280 pixels
Height : 720 pixels
Display aspect ratio : 16:9
Frame rate mode : Variable
Frame rate : 25.000 fps
Minimum frame rate : 25.000 fps
Maximum frame rate : 25.014 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.042
Stream size : 65.5 MiB (79%)
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 9mn 32s
Bit rate mode : Constant
Bit rate : 254 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 44.1 KHz
Compression mode : Lossy
Stream size : 17.3 MiB (21%)
Text
ID : 3
Format : Timed Text
Muxing mode : sbtl
Codec ID : tx3g
Duration : 9mn 26s
Bit rate mode : Variable
Bit rate : 123 bps
Stream size : 8.49 KiB (0%)
Language : English
Instead it has effect for external subtitles in the srt format, located in another file different from the one that contains the video. So this problem seems to be only for sbtl subtitles incorporated in the file.